THE MISSISSIPPIAN ROCKS OF NORTHEASTERN 

 OKLAHOMA^ 



L. C. SNIDER 

 Norman, Oklahoma 



At a recent conference of the state geologists of the states of 

 the Mississippi Valley it was decided to have prepared a brief 

 tabular statement showing the present state of knowledge of the 

 Mississippian rocks in each state, for use of those interested. This 

 tabular statement for Oklahoma has been prepared by the writer. 

 However, such a table is necessarily greatly condensed, and this 

 paper has been prepared to give a somewhat more detailed state- 

 ment of our present knowledge of these rocks. 



The brief outline presented herewith is the result of a rather 

 thorough examination of the literature on the region, and of about 

 five months of field work by the writer, assisted by J. B. Newby. 

 The field work has not been completed, and there are still several 

 points of stratigraphy and correlation on which definite statements 

 cannot be made. The paleontological collections have been 

 studied in only a preliminary way and the faunal lists are necessarily 

 incomplete. 



LOCATION AND AREA 



The Mississippian area in Northeastern Oklahoma is the south- 

 westward extension of the Ozark Uplift of Missouri and Arkansas. 

 It occupies the extreme northeastern part of the state, including 

 all of Delaware and parts of Ottawa, Craig, Mayes, Wagoner, 

 Cherokee, Adair, and Sequoyah counties. Portions of the Wyan- 

 dotte, Vinita, Pryor, Siloam Springs, Tahlequah, and Muskogee 

 quadrangles of the United States Geological Survey are included 

 in the area. The region considered, and the relative position of 

 the quadrangles are shown in the sketch map (Fig. i). The 

 Tahlequah and Muskogee quadrangles were surveyed by Joseph 

 A. Taff for the United States Geological Survey, and the folios 



^ By permission of the Director of the Oklahoma Geological Surve}'. 



613 



